SELECT 
  product_id, 
  amount 
FROM 
  cscart_warehouses_sum_products_amount 
WHERE 
  1 
  AND product_id IN (
    8175, 8389, 8390, 8391, 8886, 8553, 8451, 
    8176, 8961, 8962, 8151, 8152, 14469, 
    7980, 8154, 8313, 7979, 8256, 14468, 
    14467, 7685, 7680, 8403, 8143
  )

Query time 0.00054

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_warehouses_sum_products_amount",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 26,
      "filtered": 100,
      "index_condition": "cscart_warehouses_sum_products_amount.product_id in (8175,8389,8390,8391,8886,8553,8451,8176,8961,8962,8151,8152,14469,7980,8154,8313,7979,8256,14468,14467,7685,7680,8403,8143)"
    }
  }
}